N-600 or Passport?

[mh89]

I'm about to turn 20 in a few months (February) and I was wondering if I was eligible to apply for a US Passport and/or file the N-600 form. Here's my info:
My dad obtained his citizenship around 98-99.
I've been a Permanent Resident since Oct '00 (Along with my siblings and my mom) and I've been living in the US since Jan '01.
Thanks for your help.

[Ron Gotcher]

Apply for a passport. The Supreme Court has ruled that an unexpired US passport is the only conclusive proof of US citizenship.